Files appear too big in `du`

Matthias Schniedermeyer
2011-05-10T10:57:29Z

Hi

Since a few weeks i'm experiencing an annoying 'thing' where files are
often too big in `du` and directory totals are to high in `ls -l`.

I appears that files, which are in the process of beeing
copied/downloaded/whatever, grow in large chunks ahead of time, while
the actual file-content is beeing copied into the files. And then it
appears that the last chunk isn't shrunk after the process is finished.
Neither xfs_bmap (Version 3.1.5) nor filefrag show anything beyond the
extent that compromises the actual file-content.

I've noticed this at least with:
- "git gc"
- cp -a
- rsync
- downloads with firefox (technically Iceweasel)

Kernel is currently 2.6.38.5, Distribution is an up-to-date Debian-SID.
mount is with default-parameters, except "noatime".

Any idea how to debug this, or is this a known bug and waiting a few
days for 2.6.39 should fix this?